新增 延展系統硬碟

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+# 1. 確認磁碟大小
+
+```bash
+lsblk
+```
+
+```bash
+NAME                      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
+sda                         8:0    0   64G  0 disk 
+├─sda1                      8:1    0    1M  0 part 
+├─sda2                      8:2    0    2G  0 part /boot
+└─sda3                      8:3    0   30G  0 part 
+  └─ubuntu--vg-ubuntu--lv 252:0    0   30G  0 lvm  /
+sr0                        11:0    1 1024M  0 rom  
+```
+
+# 2. 調整硬碟大小
+
+```bash
+sudo fdisk /dev/sda
+```
+
+```bash
+Command (m for help): p
+Device       Start      End  Sectors  Size Type
+/dev/sda1     2048     4095     2048    1M BIOS boot
+/dev/sda2     4096  4198399  4194304    2G Linux filesystem
+/dev/sda3  4198400 67108830 62910431   30G Linux filesystem
+
+Command (m for help): d
+Partition number (1-3, default 3):
+Partition 3 has been deleted.
+
+Command (m for help): n
+Partition number (3-128, default 3): 
+First sector (3719168-46137310, default 3719168): 
+Last sector, +/-sectors or +/-size{K,M,G,T,P} (3719168-46137310, default 46135295):
+Created a new partition 3 of type 'Linux filesystem' and of size 62 GiB.
+Partition #3 contains a LVM2_member signature.
+Do you want to remove the signature? [Y]es/[N]o: N
+
+Command (m for help): p
+Device       Start       End   Sectors  Size Type
+/dev/sda1     2048      4095      2048    1M BIOS boot
+/dev/sda2     4096   4198399   4194304    2G Linux filesystem
+/dev/sda3  4198400 124217694 130019295   62G Linux filesystem
+
+Command (m for help): w
+The partition table has been altered.
+Syncing disks.
+```
+
+# 3. 調整 PV 大小
+
+```bash
+sudo pvresize /dev/sda3
+```
+
+# 4. 調整 LV 大小
+
+```bash
+sudo lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
+```
+
+```bash
+sudo resize2fs /dev/ubuntu-vg/ubuntu-lv
+```